B29K2509/02

Method for manufacturing interdental cleaning tool
11351705 · 2022-06-07 · ·

To provide method for manufacturing interdental cleaner for suppressing elastomer from insufficiently filling into space around shaft portion in filling the elastomer into mold. Method for manufacturing interdental cleaner includes first step of molding base portion having handle portion and shaft portion (40) by filling composite material into first mold, and second step of forming cleaning portion, slip resistance portion and coupling portion by filling elastomer into second mold (200) from distal end portion side of shaft portion (40) with base portion situated in second mold (200), second mold (200) having second space for forming cleaning portion, slip resistance portion and coupling portion. What is used as second mold (200) in second step has ratio no less than 40% of a flow path area in second space for elastomer around distal end portion of handle portion to flow path area in second space for elastomer around proximal end portion of shaft portion (40).

Resin composition and use of same

A resin composition comprises: a modified EVOH (A) that is represented by a following formula (I), has contents (mol %) of a, b, and c based on the total monomer units satisfying following formulae (1) through (3), and has a degree of saponification (DS) defined by a following formula (4) of 90 mol % or more; and inorganic oxide particles (B), wherein a content of the inorganic oxide particles (B) is from 5 to 5000 ppm. Such a resin composition is improved in adhesion to a resin other than EVOH, secondary processability, and flexibility without decreasing the performances originally possessed by EVOH, such as gas barrier properties, transparency, flavor retention, solvent resistance, and oil resistance. Accordingly, the resin is preferably used as a molded article, a film, a sheet, a heat shrinkable film, a thermoformed article, a multilayer structure, a coinjection stretch blow molded container, a fuel container, and the like. ##STR00001##
18≤a≤55  (1)
0.01≤c≤20  (2)
[100−(a+c)]×0.9≤b≤[100−(a+c)]  (3)
DS=[(Total Number of Moles of Hydrogen Atoms in X,Y, and Z)/(Total Number of Moles of X,Y, and Z)]×100  (4).

Sensors for three-dimensional printing systems and methods

The present disclosure provides methods and systems for printing a three-dimensional (3D) object. The methods may comprise providing, adjacent to a build surface, a film comprising a polymeric precursor. A sensor may be used to determine a profile of the film. The profile may be indicative of a quality of the film. If the profile meets a quality threshold, at least a portion of the film may be exposed to light to initiate formation of a polymeric material from the polymeric precursor, thereby printing at least a portion of the 3D object.

METHOD FOR SELECTIVE LASER SINTERING, USING THERMOPLASTIC POLYMER POWDERS
20220168948 · 2022-06-02 ·

The present invention relates to a process for producing a three-dimensional component by means of selective laser sintering (SLS), wherein a processing temperature T.sub.x is established in a build chamber, and a powder layer consisting of a thermoplastic polymer powder is provided in the build chamber. The thermoplastic polymer powder comprises a blend of a semicrystalline polymer, an amorphous polymer and a polymeric compatibilizer. The polymer powder is then melted in a spatially resolved manner by means of a directed beam of electromagnetic radiation, wherein binding of the regions of the melted and resolidified polymer layer by layer in multiple steps affords a three-dimensional component. In the process of the invention, the temperature in the build chamber during the performance of the individual steps varies by not more than +/−10% from the processing temperature T.sub.x set. In addition, the processing temperature T.sub.x differs by not more than +/−20 K from the processing temperature T.sub.x(A) of a polymer powder comprising the corresponding semicrystalline polymer as the sole polymeric component.

CURABLE COMPOSITIONS, ABRASION-RESISTANT ARTICLES, AND METHOD OF THERMOFORMING THE SAME

A curable composition comprises at least one polymerizable compound and alpha-alumina particles. The alpha-alumina particles, taken as a whole, have a D.sub.V50 of less than 100 nanometers. The corresponding cured composition, and an abrasion-resistant article comprising an abrasion-resistant layer comprising the reaction product disposed on a substrate are also disclosed. A method that includes thermoforming the abrasion-resistant article is also disclosed.

Polymer composite material having oriented electrically and thermally conductive pathways

A method of forming a polyolefin-perovskite nanomaterial composite which contains oriented electrically and thermally conductive pathways. The method involves milling a polyolefin with particles of a perovskite nanomaterial, molding to forma composite plate, and subjecting the composite plate to an AC voltage. The AC voltage forms oriented electrically and thermally conductive pathways by partial dielectric breakdown of the composite. The presence of the oriented electrically and thermally conductive pathways gives the polyolefin-perovskite nanomaterial electrical and thermal conductivity and dielectric permittivity higher than the polyolefin alone.

Compositions and methods for food packaging

Compositions comprising a fiber component, optionally a dispersing agent operable to disperse the fiber component to create a fiber matrix, a starch component distributed essentially throughout the fiber matrix, and a filler component are disclosed. Methods of forming articles such as containers and packages from such compositions are also disclosed.

Method for producing antimicrobial nanofilms packaging cover based on Titanium nano-dioxide through extrusion for extension of food shelf-life

The present invention relates to a method for producing antimicrobial nanofilms packaging cover based on Titanium nano-dioxide through extrusion for extension of food shelf-life. The method comprises the steps of providing nano-silver and nano-clay particles which are antimicrobial agents to enhance mechanical properties of packaging in food industry; and evaluating effects of nano clay and nano silver packaging on the growth of these bacteria within 6 days of shelf life keeping at 4° C. The silver and clay nanoparticles are analyzed using AFM, SEM, FESEM, EDX, FTIR and TEM, wherein the size of clay and silver nanoparticles are measured 15 nm and 35 nm, respectively.

STEREOLITHOGRAPHICALLY PRODUCED SHAPED DENTAL PARTS AND METHOD FOR PRODUCTION FROM PHOTOPOLYMERIZABLE COMPOSITE RESIN COMPOSITIONS
20220151749 · 2022-05-19 ·

The invention relates to the use of flowable, photopolymerizable composite resin compositions that comprise a nanoscale organic surface-modified filler for stereolithographically producing a shaped dental part and to a method for producing corresponding shaped dental parts. The method according to the invention is particularly simple, fast, reliable and cost-effective. It allows improved shaped dental parts to be produced, in particular improved bridges and crowns.

System and method for integrated deposition and heating

Herein disclosed is a method of manufacturing comprises depositing a composition on a substrate slice by slice to form an object; heating in situ the object using electromagnetic radiation (EMR); wherein said composition comprises a first material and a second material, wherein the second material has a higher absorption of the radiation than the first material. In an embodiment, the EMR has a wavelength ranging from 10 to 1500 nm and the EMR has a minimum energy density of 0.1 Joule/cm.sup.2. In an embodiment, the EMR comprises UV light, near ultraviolet light, near infrared light, infrared light, visible light, laser, electron beam. In an embodiment, said object comprises a catalyst, a catalyst support, a catalyst composite, an anode, a cathode, an electrolyte, an electrode, an interconnect, a seal, a fuel cell, an electrochemical gas producer, an electrolyser, an electrochemical compressor, a reactor, a heat exchanger, a vessel, or combinations thereof.